Fourdrinier paper-making machine



Jan. 14, 1930. w. H. DELAHAYE 1,743,808

FOURDRINIER PAPERMAKNG MACHINE Filed Feb. 27, 1929 Patented Jan. 14, 1930 UNITED STATES WALTER HAMILTON DELAHAYE, OF OTTAWA, ONTARIO, CANADA FOURDRINIR PAPER-MAKING MACHINE Application led February 27, 1929, Serial No. 343,037, and in Canada February 22,1929.

The invention, in its broad aspects consists in the construction of any paper Working machine that employs an endless carrier so that such carrier may be removed and replaced in the machine without dismantling those parts which lie within the loop of the carrier. The principall application, and that dealt with in this application, by Way of an example is in the application of such a constlruction to a Fourdrinier paper-making mac me.

In such machines the necessity of changing the wire frequently arises through wear and as these machines run at high speed and have an enormous output any delay in making the machine ready for use is quite serious. In the older type of machine, which were quite small compared to the presentlday ones, it was necessary to dismantle much of the machine, an operation requiring several hours. But as the size of the machine increased this became more diiiicult and as pointed out above, due to increased speed, the loss was correspondingly greater. To avoid this delay and the labor of dismantling the machines a type has been developed in which the table section, sometimes including the suction boxes, may be run out laterally on temporary rails while the wire is being put in place. The object of this invention is to construct the machine so that the wire may be put in place without dismantlingand Without running the table section to one side.

The construction of the machine will now be explained with reference tothe accompanying drawings in which Fig. 1 is a somewhat diagrammatic side elevation of the machine. Fig. 2 is transverse section through the line 2-2 of Fig. 1. Fig. 3 is a sketch of the planks and Fig. 4 is an elevation, partly in section, of one of the spacing blocks. y Referring to the drawings, in which similar parts are designated by the same reference numeral throughout the various views, the table frame may consist of the usual side frames 1 and 2 connected by the usual bracing and carrying the customary breast roll 3, table rolls 4, and suction boxes 5. The couch roll 7 is mounted on separate bea-rings 8. The side frame 2 is supported directly on a Ymotor 17. One of the subframe 9, which may be of any construction but should be provided with openings 10 for a purpose which will be explained later. The invention resides in the construction of the side frame 1 and its supporting frame, indicated4 at 11 and this willnow be eX- plained. The frame 1 is not supported direct ly on the frame 11 but is spaced therefrom by means of a set of blocks 6. Mounted on a set of bearing brackets carried on the frame 1 are a set of rollers 12, shown as being mounted on a common shaft 14. Vhether these rollers12 are fast on the shaft or not depends on which construction is found to give the best results. The frame 11 carries a similar set of rollers 13 and these are designed to be driven by a shaft l5 which, through gearing indicated at 16, may be driven by a bearings 8 on the same side of the machine as the frame 1, is provided with a set of rollers 18, 19, the latter of which may also be driven by the motor 17. The the wire is shown at 20.

The operation of the device will now be explained. The old wire having been cut and run off, the machine is ready to receive a new one except for the simple operation of removing a few guide rolls, the deckle rolls and the iowbox apron. A long truck 21, having a support 22,whichis ofapproximately the same length as the Wet end of the machine, is placed along the machine at a distance from the side frame 1 somewhat greater than the width of the wire. The support 22, is on a level vwith the rollers 13, and the truck may also have a support extending to the breast roll and of a height to suit the location of the roller 19. A series of planks or the like, the term being only used in a broad sense to indicate long flat members of fair Width, are placed on the supports 22 and 24 on the one hand and in the bite of the rollers 12, 13, and 18, 19. By means of jacks or by any other means the weight .is lifted of the blocks 6, so that these may be removed. The new wire is now draped over the planks shown at 23, Fig. 2 and other planks are laid over the wire 20 and the planks 23. The jacks or whatever means that are employed may now be lowered until the upper rollers rest on the planks and are then removed. If the motor is now started up it will be seen that the wire will be fed through the plane of the side frame into the desired position. When this has been accomplished the operations are reversed. That is to say the jacks are replaced andthe frame 1 is lifted off the planks, the blocks 6, are positioned to take the weight of the machine, the planks are removed, the jacks lowered and the blocks fastened in place. When the parts which were removed have been replaced the machine is again ready for use.

The construction of the parts shown in the Figs. 3 and 4 will now be explained and also the method of using them which differs slightly from that just described above. The plank 23 is provided with a'short head piece 26, which is slightly tapered on its upper surface. This piece may be located on the plank by means of dowels or the like, 27. At the inner end of the taper the part 26 presents a short surface 28 which is parallel to the plank. The end of the head piece is recessed to receive the plank 25 which has a complementary tongue 29 and the plank may also be provided with a dowel or the like 30. The block shown in Fig. 4 is an example of one that may be quickly removed. Bolts 31 are passed through the body of the block and are threaded into a nut 33 in a recess in the block as shown. The screws have right and left threads and means may be provided in each block to turn the nut, shown as a shaft having a worm thereon engaging one suitably cut in the nut. The bolts are provided with large rectangular heads 32 to engage in T slots in the brackets supporting the rollers, or on any other part of the surface of the parts 1 and 11. In using the parts just described the planks with the piece 26 in place are pushed into the bite of the rollers. The blocks 6 are loosened by turning the shafts 34, so that the frame 1 may have a slight rise. If the planks are fed in until the parallel surface is reached the blocks will be relieved of the weight and may readily be removed. The wire may now be placed on the planks and the upper planks put in posit-ion. It may rove advisable to have the top plank just shghtly longer than the width of the wire and with a short trailino taper on the end, the purpose of which will presently appear. When the wire has been fed to a position inside that occupied by the blocks 6, these may be replaced, ready to be tightened when the frame is lowered which is permitted by the trailing taper on the end of the top plank passing under the rollers. The blocks may now betightened and the machine be placed ready for use as previously described.

The above is only meant to convey to those skilled in the use of such machines the basic idea of the invention and the method of usino it, which may vary in regard to many detail? owing to peculiar circumstances surrounding the individual installations. None of the terms in the specification arc to be taken in a restricted sense but are toV be interpreted in the broadest sense and in accordance with the spirit of the claims appended hereto. As pointed out, the term lanks is not to be taken literally and may inc ude any long member, whether of wood or steel or of a combination of both. In some cases it may rprove necessary to provide 4the rollers with gear teeth to give a positive feed but all these variations are meant to be covered in the appended claims.

What I claim as my invention is 1. The method of changing a wire or the like, which consists in feeding it through a gap in the side frame of the machine, the machine above the gap being supported by the part of the frame lying below the gap.

2. In the method set forth in claim 1, the step of supporting the wire on members which carry the weight of the upper part of the machine during the feeding operation.

3. The method of changing a wire which consists in feeding the wire between members through a gap in the side frame of a machine, said members carrying the weight of that portion of the machine above the gap.

4. The method of changing a wire which Yconsists in providing the machine frame with a gap and feeding the wire therethrough by means of rollers.

5. In the method set forth in claim 4, the step of providing the wire with members to engage the rollers and prevent injury of the wire thereby.

6. The method of changing a wire which cons1sts in providing frame with removable sect1ons so that va gap may be formed in a side frame thereof, removing the sections and support-lng that part of the frame above the gap by members capable of being fed laterally therethrough, said members being placed in palrs and carrying the wire therebetween.

7. In a paper handling machine, a side frame having a gap therein designed to permit feeding of a wire therethrough while permittmg the supporting of that part of the frame above the gap by that below the gap.

8. In a papermaking machine having an endless carrier, the combination of a frame supporting the rolls on which the carrier travels with means to support said frame, one of said means consisting of a member spaced below a side member of said frame, means to support the side member from said first mentioned member in said spaced relation, rollers carried by said side member and said other member between which the said endless carrier may be fed into operative position.

9. In combination with the machine set forth in claim 8 members adapted to be placed in pairs between the rollers with the endless carrier therebetween.

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10. In combination with the machine set forth in claim 8, means for driving certain of said rollers.

11. In combination with the machine set forth in claim 8, a couch roll on a separate set of bearings, one of said bearings being provided with a corresponding -set of rollers and means for driving certain of said rollers.

12. In combination with the machine set forth in claim 8, said supporting means consisting of removable blocks and means to both the side member and said first mentioned member to said block.

13. In a Fourdrinier machine a set of table rolls and a frame therefor, means for sup# porting said frame, one of said means consisting of a support spaced therefrom and the other means attached directly to said frame removable members between said spaced members, rollers carried in pairs by the, frame and the spaced support adjacent the said removable members, apertures in the other support opposite the pairs of rollers, and pairs of members adapted to be fed through the pairs of rollers and the apertures during a wire changing operation.

14. In combination with the machine as set forth in claim 8, members adapted to be fed through the gap between said rollers, one of said members presenting a tapered section.

15. In combination with the machine set forth in claim 8, a pair of elongated members adapted to be fed through the gap between said rollers, one of said members having a tapered section and a removable section.

16. In a Fourdrinier machine a side frame having spaced sections, removable blocks between the sections and means to feed pairs of planks between said sections when the blocks are removed.

17. In the machine as set forth in claim 16, said planks carrying means to free the removable sections of the weight of the frame carried thereby.

18. In a machine as described in claim 16, a set of planks adapted to be fed through the gaps between the rollers, a truck to support the free end of said planks, said truck being free to approach the frame during a wire changing operation.

19. In combination with a side frame of a paper handling machine having a gap therein provided with rollers, a set of planks, said planks being in pairs, one plank of each palr being in sections.

20. In the machine described in claim 19, the sectional plank consisting of a short 'tapcred section and a long parallel section, said section being dowelled to the unitary plank.

In testimony whereof I have signed my name to this specification.

WALTER H. DELAHAYE. 

